Reset the default values of work package and work package journal duration

db/migrate/20220620132922_change_duration_default_value.rb

@@ -0,0 +1,22 @@
+class ChangeDurationDefaultValue < ActiveRecord::Migration[7.0]
+  def up
+    set_duration(:work_packages)
+    set_duration(:work_package_journals)
+  end
+
+  private
+
+  def set_duration(table)
+    execute <<~SQL.squish
+      UPDATE
+        #{table}
+      SET
+        duration = CASE
+                   WHEN start_date IS NULL OR due_date IS NULL
+                   THEN NULL
+                   ELSE
+                     due_date - start_date + 1
+                   END
+    SQL
+  end
+end